That's how Larian write things...
The game start in hell with mindflayer and dragons and cambions and you're going to the underdark at level 3 + there's another dragon and every creature is powerful and...
Everything is so sensational that nothing is really sensational anymore.... Whatever we're talking about the story, the visual effects, the surfaces, the combats,....
Well, you have to somehow grab the attention of potential buyers. It's hard to find the balance between a good story and grabbing attention.